Exchange of Words, Opalescence, Wormfang Manta, and Baboon Spirit

Prerequisites

• Exchange of Words in hand
• Opalescence on the battlefield
• Wormfang Manta on the battlefield
• Baboon Spirit on the battlefield
• at most each turn available

Steps

1. Cast Exchange of Words by paying
2. When Exchange of Words enters the battlefield, it triggers, exchanging the text boxes of it and Wormfang Manta
3. Activate Baboon Spirit by paying , exiling Wormfang Manta At the beginning of your end step, Baboon Spirit triggers, returning Wormfang Manta from exile to the battlefield
4. Exchange of Words leaves and enters the battlefield, triggering the second ability it gained from Wormfang Manta's textbox as well as its own ability
5. Resolve the first Exchange of Words trigger, causing you to take an extra turn after this one
6. Resolve the second Exchange of Words trigger, exchanging the text boxes of it and Wormfang Manta
7. Repeat from step 3 during each turn

Results

• Infinite turns